FVXX21 KWBC 030615
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VOLCANIC ASH ADVISORY
ISSUED 0615 UTC 03 NOVEMBER 1999 BY THE WASHINGTON VAAC
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TUNGURAHUA 99-067 ECUADOR 1.47S 78.44W
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BACKGROUND: TUNGURAHUA ECUADOR (1502-08)
SUMMIT HEIGHT 16480 FT (5023 M)
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SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL
IMAGERY...GUAYAQUIL METEOROLOGICAL WATCH OFFICE...INSTITUTO
GEOFISICO IN ECUADOR...NUMERICAL MODEL WEATHER DATA FROM THE U.S.
NATIONAL WEATHER SERVICE.
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ERUPTION DETAILS: THE INSTITUTO GEOFISICO DESCRIBES A CONTINUOUS ASH
GRAY EMISSION FROM THE VOLCANO AS WELL AS INTERMITTENT EXPLOSIONS.
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DETAILS OF ASH: NO ASH CAN BE DISCERNED IN INFRARED OR MULTISPECTRAL
SATELLITE IMAGERY THROUGH 0545 UTC. SCATTERED LOW AND MID LEVEL
METEOROLOGICAL CLOUDS MIGHT BE HAMPERING ASH DETECTION. UNTIL
SEVERAL HOURS AGO ASH BETWEEN FL300 AND FL340 COULD STILL BE
OBSERVED EXTENDING FROM THE SUMMIT TOWARD THE SOUTHEAST.
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TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH BETWEEN FL300
AND FL340 WOULD MOVE TOWARD THE SOUTH AT LESS THAN 10 KNOTS.
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REAL TIME SATELLITE IMAGERY ALONG WITH THIS AND OTHER VOLCANIC ASH
ADVISORY STATEMENTS OFTEN ACCOMPANIED BY A MAP DEPICTING ASH
LOCATION ARE AVAILABLE AT INTERNET URL ADDRESS
http://www.ssd.noaa.gov/VAAC/washington.html
(all lower case except /VAAC/)
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OUTLOOK: SEE SIGMETS AND VAFTAD.
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THE NEXT STATEMENT WILL BE ISSUED BY 03/1215 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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ORRISON
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NNNN